Hub Bolts are made of black phosphate heat treated alloy steel. Lakshman Tools Pvt. Ltd. Manufactures Hub Bolts. Lakshman Tools Pvt. Ltd., an ISO 9001:2000 certified company manufactures high tensile steel fasteners suitable for applications in all types of industries and automobile companies. The fastener products are sold under the brand name of " RHINO" . Strength Designation Class/Grade of Hub Bolt is 12.9. These Hub Bolts are used in the manufacturing of heavy trucks/buses with high load carrying capacity. The Hub Bolts can also be manufactured as per the specifications of the customer.